panda327

iTrader: (3)

Hello all,

I have a 2009 RWD IS250 and I have been getting loud clunking noise from the rear suspension when going over bumps. The bump sounds like metal slapping against each other. I took it to a shop and they say it could be the shocks, but trying to get a warranty from BC racing has been slow so I am wondering if anyone else has had this issue before and how you fixed it?

Could it be my rear is too low and the coils are slapping against each other over bumps causing the noise?

Thanks in advance for the input.

SCWB

This issue has been long complained from BC users. Clunk usually happens in the rear.

Search and you will find, lots of them

mjh09e

iTrader: (2)

I had this problem...but the rear sway bar was loose...Check that out to start.

600rr05

iTrader: (9)

i have the same thing coming from my right rear but ive heard it all all heights i did check it and one of the adjusters was loose i tightened it up and went away for a bit but its back.. Just turn up your radio ha

panda327

iTrader: (3)

I actually had the car checked out for loose parts already by a shop... all seems to be tight

i was going to raise the car up a bit to see if its the coil slapping but judging from 600rr05's post thats not the case... i hope BC racing is a little more speedy with their warranty process

marine1342

Don't have BC but thought my clunking noise was something suspension related.
Turns out that my exhaust (midpipe/axle area) was hitting a cross bar underneath it.

Gville350

iTrader: (10)

How did you set preload, or how much preload? I set my BCRs at neutral + 1 full turn. I think the whole assembly has settled, so I need to reset the preload again. Perhaps the sound is the spring rattling around on the expansion stroke of the shock? That's what I think I get some times going over bumps.

SCWB

https://www.clublexus.com/forums/sus...c-coils-5.html

600rr05

iTrader: (9)

i thought the same thing thats why i adjusted it more. I also send BC a e-mail ill let you know if i hear anything. Im wondering if its similiar to the Fsport spring problem when they did the TSIB

Gville350

iTrader: (10)

Just thought of this...I wonder if the majority of these phantom noises come from those with the rubber top hat mounts. I opted for the pillow-ball mount, and have not had a thing wrong with these coilovers at all.

600rr05

iTrader: (9)

i rec'd a email back from BC and they requsted photo's which i will be taking for them as soon as i know exactly what they want photo's of

mong

iTrader: (4)

I was debating weather to get bc racing or fsport shocks later on.. after hearing all the noise issues about it. I think I'm gonna go with the fsport now

600rr05

iTrader: (9)

Mong they are still great coilovers. I also got a e-mail back today from BC here is what they said im gonna try it hopefully tonight and see if it works
Ususally that noise comes from a loose top nut(under the adjustment ****).
This video will demonstrate to you the proper way to ensure that nut is tightened and remove one possibility.

http://vimeo.com/28427984

panda327

iTrader: (3)

^^ I've tried that to readjust the preload... it didn't work at all...I also tighten the bolts and everything even took it to a shop to have them have a crack at it ...

I finally got BCR to send me replacements shocks for my rear... they said they sent it out 3 week ago and i still have not received the replacements yet.. i sent them an email on monday asking where it is and no reply still.

I am seriously regretting this purchase.. shouldn't have cheape out.

600rr05

iTrader: (9)

That sucks I re adjusted my pre load and all the noises went away. Sucks to hear you haven't gotten the replacements give them a call instead of emails